And the Arsenal boss admits he may have brought the 26-year-old back too soon after his summer exploits.

"I played him very early before he was completely fit, physically," Wenger said.

"That is one explanation [for his form].

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MISTAKE: Arsene Wenger admits he may have rushed Sanchez back too soon

"The second is that every player who has won a big trophy with his national team takes some while to settle and come back to his best. These are the two main explanations for me.

"I think he has had 31 shots on goal since the start of the season and with his finishing qualities that should allow him five to six goals. Knowing that the finishing is a bit linked with your form and it is a bit cyclic as well, that is where he should be at the moment.

"That will come back, I don't worry for Alexis Sanchez. Even when he doesn't score he is still a major threat for everybody and I am confident he will score very soon."